Spherical Pump Hydrostatic Pressure Support for Reduced Friction
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Solution Overview
Problem
Spherical pumps experience unbalanced forces due to pressure differences between working chambers, leading to increased friction, energy consumption, and abrasion, primarily because of the fixed angle between the piston axis and the main shaft, which causes the piston and rotating disc to deflect, narrowing the gap and increasing friction forces.
Innovation Solution
A hydrostatic pressure support system is integrated into the spherical pump, featuring first and second liquid flow channels and pressure-bearing grooves on the slipper, which utilize hydraulic pressure to balance unbalanced forces, maintaining uniform gaps and reducing friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed angle is used between the piston axis and the main shaft to simplify the structure, then the device complexity is reduced, but the piston and rotating disc deflect toward the lower pressure side, narrowing the gap and increasing friction forces, which increases energy consumption and causes serious abrasion
Solution Approach 1:
The patent introduces a hydrostatic pressure support system that uses hydraulic pressure to counterbalance the unbalanced force generated by pressure differences between working chambers. Liquid flow channels are configured to supply high-pressure liquid to pressure-bearing surfaces, creating a hydrostatic support force that compensates for the deflecting force, thereby maintaining uniform gaps and reducing friction without changing the fixed angular structure.
2Device complexity
If a fixed angle is used between the piston axis and the main shaft to simplify the structure, then the device complexity is reduced, but the piston and rotating disc deflect toward the lower pressure side, leading to serious abrasion of the rotor and slipper, which reduces reliability
Solution Approach 1:
The patent employs a hydrostatic pressure support system where liquid flow channels deliver high-pressure liquid to pressure-bearing surfaces on the slipper and rotor. This creates a hydrostatic support force that counteracts the unbalanced force from pressure differences, preventing excessive deflection and maintaining stable gaps between moving parts, thereby reducing abrasion and extending service life while keeping the fixed angular structure.
Solution Approach 2:
The hydrostatic pressure support acts as a counterbalancing force against the unbalanced force generated by pressure differences. The high-pressure liquid supplied to the pressure-bearing surface creates a support force that opposes the deflecting force, effectively counterweighting the harmful effects and maintaining reliable operation of the rotor and slipper.
3Reliability
If the piston and rotating disc deflect to narrow the gap between the rotating disc and spherical surface, then sealing is improved, but the oil film or water film is damaged and friction force increases, which increases energy consumption
Solution Approach 1:
The patent uses a hydrostatic pressure support system to balance the forces acting on the piston and rotating disc. By supplying high-pressure liquid through configured flow channels to pressure-bearing surfaces, the system maintains the components in a balanced state, preventing excessive deflection that would damage the fluid film, while still maintaining adequate sealing gaps for effective sealing performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The hydrostatic pressure support system effectively balances unbalanced forces, reducing friction, power consumption, and extending the service life of the spherical pump by maintaining uniform gaps between moving parts, thus improving operational efficiency.
Implementation Method 1
a hydrostatic pressure support for the rotor; characterized in that the hydrostatic pressure support comprises: a first liquid flow channel; a second liquid flow channel; and at least two pressure-bearing grooves
Implementation Method 2
the hydrostatic pressure support is arranged between each of the two parallel sides of the slipper and a corresponding slipper liner
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Disclosed are a hydrostatic pressure support and a spherical pump having the same. The hydrostatic pressure support is arranged between each of two parallel sides of a slipper and a sliding groove, and includes a first liquid flow channel, a second liquid flow channel, and a pressure-bearing groove. An inlet of the first liquid flow channel is communicated with one of two working chambers of the spherical pump, and an inlet of the second liquid flow channel is communicated with the other of the two working chambers. An outlet of the first liquid flow channel and an outlet the second liquid flow channel are respectively communicated with the pressure-bearing grooves provided on the two parallel sides of the slipper.